Piraí do Sul weather in December

In December, Piraí do Sul sees average daytime highs of 26°C and overnight lows near 17°C, with 180 mm of rain across 19.9 wet days and about 13.5 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 14% of the time in December, and the air most often feels humid.

Daylight stretches from about 13 h 24 min at the start of December to 13 h 30 min by month's end. Set against the rest of the year, December is Piraí do Sul's 10th-clearest and 4th-windiest month. For the whole year in context, see Piraí do Sul's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
17°
10th coldest
Rainfall
180 mm
19.9 wet days
Daylight
13 h 30 min
6:31 AM – 8:01 PM
Cloud cover
71%
10th clearest
Wind
10 km/h
4th windiest
Solar energy
5.88 kWh/m²
Travel score
5.1
out of 10

Piraí do Sul is settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical December day in Piraí do Sul reaches about 26°C in the afternoon and slips back to 17°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 29°C. Set against its neighbours, December runs about 1°C warmer than November and on par with January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12516
22516
32516
42516
52516
62516
72516
82516
92516
102516
112516
122516
132516
142617
152617
162617
172617
182617
192617
202617
212617
222617
232617
242617
252617
262617
272617
282617
292617
302617
312617

Piraí do Sul weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 17°24224.113.34.5
Feb26° / 17°18020.812.94.6
Mar25° / 17°13518.212.25.5
Apr24° / 15°719.611.46.9
May20° / 12°949.210.86.6
Jun19° / 11°96810.56.6
Jul20° / 10°796.810.66.9
Aug21° / 11°717.111.17.3
Sep23° / 12°13010.311.86.7
Oct24° / 14°14515.512.65.9
Nov25° / 15°13916.313.25.8
Dec26° / 17°18019.913.55.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23565
33466
43466
53466
63367
73367
83367
93367
103367
113367
123466
133466
143367
153367
163466
173565
183565
193565
203565
213466
223466
233466
243466
253268
263169
273169
283070
293070
303070
312872

Chance of precipitation in December

Any precipitation

Piraí do Sul gets around 180 mm of rain over 19.9 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 65% and peaks near 73% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
157
258
358
459
560
660
761
861
962
1062
1163
1263
1364
1464
1564
1665
1765
1865
1966
2066
2167
2267
2368
2468
2569
2670
2770
2871
2972
3072
3173

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the humid band about 43% of days. Sticky, muggy-or-worse air turns up on roughly 30% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
110274617
29274618
38264619
48264719
58264720
67254721
77254721
87254722
97244623
107244623
116234624
126234625
136224626
146224526
156224527
166214428
176214429
186214330
195214331
205204232
215204233
224204135
234194136
243194037
253194038
263184040
272183941
282173942
292173843
301173844
311163845

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 24 min at the start of December to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:27 AM to 6:38 AM, and sunset from 7:52 PM to 8:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.46:277:52
213.46:277:53
313.46:277:53
413.46:287:54
513.46:287:55
613.56:287:55
713.56:287:56
813.56:287:57
913.56:287:57
1013.56:297:58
1113.56:297:58
1213.56:297:59
1313.56:308:00
1413.56:308:00
1513.56:308:01
1613.56:318:01
1713.56:318:02
1813.56:318:02
1913.56:328:03
2013.56:328:03
2113.56:338:04
2213.56:338:04
2313.56:348:05
2413.56:348:05
2513.56:358:06
2613.56:358:06
2713.56:368:07
2813.56:368:07
2913.56:378:07
3013.56:378:08
3113.56:388:08

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.88 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.13 kWh/m² to a high of 5.88 kWh/m² in December across the year — December's 5.88 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.7Bright
Planning a trip in December

Is December a good time to visit Piraí do Sul?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.1
Sightseeing
10th-best month of the year
4.8
Beach & pool
6th-best month of the year

December is a reasonable time to visit Piraí do Sul for sightseeing.

What to pack for Piraí do Sul in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Piraí do Sul sees daytime highs around 26°C and nights near 17°C. Pack rain gear. Worth having: light clothes and sun protection. About 20 days see rain.

rain gearlight clothessun protection

UV index in Piraí do Sul in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Piraí do Sul peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 5 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 19UV 15Jul 13UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug7Very high
Sep5High
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Piraí do Sul in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Piraí do Sul is worst in September — around 17 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (March, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1316 µg/m³Mar 136 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar6Good
Apr7Good
May8Good
Jun8Good
Jul10Good
Aug14Moderate
Sep17Moderate
Oct10Good
Nov7Good
Dec7Good
Location & terrain

Where is Piraí do Sul?

Piraí do Sul sits at 24.5°S, 49.9°W, 1,000 m above sea level, in Brazil. The nearest listed city is Castro, 30 km away.

Topography around Piraí do Sul

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Piraí do Sul.

Within 3 km, the terrain around Piraí do Sul has only modest variations in elevation — a maximum elevation change of 207 m around an average of 1,038 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 414 m; within 80 km, large variations in elevation — a maximum elevation change of 1,159 m.

The land around Piraí do Sul is covered by trees (47%) and grassland (24%) within 3 km, trees (49%), cropland (29%) and grassland (22%) within 16 km, and trees (59%) and cropland (26%) within 80 km.

3 km
207 m
16 km
414 m
80 km
1,159 m
treesgrasslandcroplandartificial surfaces
December weather nearby: Castro 30 km · Jaguariaíva 40 km · Arapoti 43 km · Tibagi 47 km · Ponta Grossa 67 km · Sengés 67 km · Telêmaco Borba 71 km · Wenceslau Braz 74 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Piraí do Sul (-24.5261°, -49.9486°, elevation 1,000 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).